Power Source DC12V±10%;transformer or UPS power supply(AC:110-240V) Assurance_temperature -40°C～+55°C Monitor handset Max_Wiring Distance 5000 Meter;1200 Meter Dimension 246*108*38 Weight about 1.202 KG Ring Bell Chord Melody Music Wiring System wiring: use RVV4*0. 5 between door station and indoor phone ( 4 general bus); use RVV2*0.3(2-wire none-polar) between module and indoor phone. Call Function confidential conversation, emergency alarm functions Extension Up to 4 handsets with one unit is available Door Release function signal unlocking/power unlocking Specification Features>> l Door station: one door station can connect with 400 indoor phones l Door station with card reader function and keypad function are optional. ID cards can be registered and deleted by pressing the key button of the door station, so as the patrol cards. Information on users in or out gate and patrol records can be read and printed in management computer. ? The system can provide friendly interface system software, based on windows 98 & windows 2000 system, the software can inquire & register user?s files, user?s alarm messages, user?s inductive card reading record messages, patrolling record messages, electronic map etc. ? Management unit or wall station: The system can provide network function through connecting door station with Management unit or wall station. If more Management units or wall stations needed, just add extra switcher SW-03N, one communication channel is provided for this network system . ? Wall station can unlock by password or by sensitive card. Indoor phone can unlock door for wall station. ? System capacity: 32 door stations available, max. system capacity can be up to 256 door stations by adding digital repeaters-- RS-485, E-01R and video amplifier VM-03N. ? The system is compatible with audio and video NL1 systems and CM-06L villa system in network function. l Specific functions can be added for the individuation design requirements at any time. l System combinations:: Door station: WL-03NLA (with card reader)/WL-03NL(without card reader) Module: WL-03NLCH Audio indoor phone: WL-02NLFD Audio management units: WL-03NHMC Audio wall station: WL-03NWDA (with card reader)/WL-03NWD (without card reader) Network port: D-03N(to transmit the digital information on card reading in network system ) Digital repeaters: RS-485/E-01R power supply: PS-5A/PS-2/PS-2E optional.